Are RNA viruses worse than DNA viruses?
RNA viruses generally have very high mutation rates compared to DNA viruses because viral RNA polymerases are not able to correct DNA polymerases. The genetic diversity of RNA viruses is one of the reasons why effective vaccines against them are difficult to develop.
Why do RNA viruses mutate faster than DNA viruses? But RNA viruses like SARS-CoV-2 are evolutionary gamblers of the microscopic world. RNA polymerase, which copies the viral genes, generally lacks the ability to correct, making RNA viruses susceptible to high mutation rates – up to a million times greater than their host’s DNA-containing cells.
Is a virus a disease?
Viruses and disease are not the same thing. The virus can cause a person to develop a disease. The disease can result from contracting a virus through surface contact or airborne droplets. Although viruses and diseases are related, the terms should not be used interchangeably.
How long can COVID-19 stay in your body? However, for most infected people, viral levels in the body peak between three to six days after the original infection, and the immune system clears the pathogen within 10 days. Virus shed after this period is generally not contagious.
Is COVID-19 an infectious disease?
Coronavirus disease (COVID-19) is an infectious disease caused by the SARS-CoV-2 virus.